Steam generating apparatus



May 7, 1935. s. F. BURNET 2,000,500

STEAM GENERATING APPARATUS I Filed April 4, 1932 2 Sheets-Sheet l 1T ia.

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Patented Y May 7, 17935 o STEAMaGENRATmeABPARMUS t o Y Samuelrfllkurnet; Webster,-Groves,zMo., assigfnor;y Y

to kLacledef Christy-.Clay Products Company, St. 4 IiouispMvoL, a,v corporation-of ApplieationApril-4, 1932, SerialNo.` 603,000"

aclaim's. ,(01, gaa-302) This. invention relates to-boilers ofthe kindthat are used-fin:factoriesA Aand--power-plantsiorgeneratingsteam. -V

Itfisvfcommon practice-fparticularlytwith small 5= boilers; to arrange-a plurality Aofboilersside by side,A soas toproduceaso-called -battery boiler made-up of'anumber-of complete steam generatingunits, eachoffwhich comprises a combustion chambeihthat is separate and ydistinctfro'm and l0f not-'inf.communicationewith a combustion chamben-of another unit. In --afbatteryf of two boilers the-settingicomprises-two outer sidewalls; each of WhicIMOrmscne-Side0wall of a combustion cham ber-fofr one-unit,k and the-setting# also comprises front and rear walls anda single`intermediate walllthatll'is arrangedbetween thetwo boilers, so

as to form a party wall thatseparates or di vides the-combustionfchambersf of the respective uni-ts f Modern:` boiler -practice-y has demonstrated that a single 4large-boiler`vy is-more eiiicient'and ,eco-- nomical that-.fa plurality of smallboilersof equal heatingv--area/and equal 5 steam dis'engaging area,

and accordingly,A inl designing/orbuilcling` aL powerY p plantiof aicertain capacity or rating; itis now therpreferredpracticeto use a singlelarge boiler in place of a plurality of small boilers. Notwithstandingvthe recognizedsuperiority of-la single large boilergoverf a0 battery of small boilers, itis not;V always practicable` or feasible from al financialistandpoint'f for the ownerlt of a battery of small.` boilers.. to remove 4the samel and'=,"replacet Myfinventionrhas :for it main objectY tozprovideV afsteamgeneratinguapparatus.composediof ia pluralityfeoV smallpboi-lers, set `side :by"side,and setting` wallsiand .anzarchporarches, combin'edLwith saidl WT boilerseinssucha;` way.;y asfto L produce L ai stearnsgen:` eratinggtapparatus: that` is practically aseiiicient.4 and economical as a.single-flargegboiler` oli-equal heatingarea; and;4 steam disengaging area,A but which :cambeifproduced: ati a considerably Ylowere cost ,thanaaefsinglelargeboiler, due to'the fact thattgisfmademp, of ,two or more existingsmall; boilersttorwhich parts are added;- A

o Briellygdescribed, my,improvedfsteam generatnggapparfatus consisi',sofj two or more-small. 56;, boilers set sidefbyside; andeach;comprisingboile er tubes disposed in parallel relation to the side walfstofstlieettingeanddrums attached to thev ends of the tubes and disposed transversely of the setting, a front Wall that forms the front side of 00 a combustion chamber commonto lall of the small boilers,`v side walls for'said'combustiow clalnbr;A

andcasuspended arch 'structure' (or' arclif' structur'es,- if there are-more-than two-boilers) f areA ranged at the-top of the-"combustion cham-herrinI suchv a IWay asto Aprevent the-productsof-"com'- bustion escaping from the combustion chamber* at the dividing line of thelboilers; and; also prevent'the'products of combustion from injuriousliy/ affectingV the overhead supporting structurefusedV tovsupport or partly sustain theeleVatedstea-m and-'Water drums that communicate with' the water tubes. The-apparatuslmay` comprisef-any preferred number of small boilers, andanymreferred or suitable typeof suspendedarch may-abe;- used to bridgeythe spaceor-spacesatthe:topliof:` the combustion chamber betweenuthefseparatei small boilers.v I'prefer, however; to usefa'flatfarclt or arches each of' whichI is made upr ofvre fractoryblocks or tilesuspendedfromansover-I head',t supportingv structure that vcarriesaorvas-'v sists in carrying the elevatedidrumsfotthesmall, boilers, saidl archl or arches extending. contlnu` ously` orU unbrokenly from Vthe frontfwall'-touthei Y rearwall ofthe combustion chamber.'v Y

' I 'have herein illustrated my inventiontapplied; to 1a pairf of Sterlingtype-Y boilers; but, asf-previ'-y ously stated, the vnumber of boilers `and thes type' or kindfof boilers is limmaterial,-` so long a'sthe-l small b'oilers'are provided with" tube. banks-dis4 posed 'so that the tube. banks oftha respectivei boilers extendrparall'elto each other andvfalsoparallelito the side walls offthe setting,pandf' transversely disposed drums attached. tozthe boiler.y tubes `and arranged parallel toy the fronty wallo thel setting.y 1 f 1 Figure 1'of:thedrawings is a vertical transversey sectional View of a steam'generatingvapparatus constructed Vin accordancev with my' invention; l and FigurelZ is aV vertical longitudinal sectional. view off' said apparatus, taken approximately; through- Athelongitudnal center'of the suspendedi arch;

In the accompanying drawings whichy illustrate; if the prefe'rredfform of my invention; A designates tlie-v elevated `drums -or steam-and-'waterf drlums of two Sterling'typevb'oilrs arrangedI sidefbysid;L Y BfdeSignates the mud drums: and C' designates` tube banks made up of'watertubes that constitute th'e heating surfaces-of:saidboilers:l setting for'said boilers comprises two. outerwails D that Vform the opposed-side.wallsof'raccombuse1 tion chamber E that is commoxrtofboth-'fozthe; boilers; afront wall. F. and'ta rearwall aforesaid: combustion. chamber,` `andza suspendeclzarcmH-, preferably a1 atarch, arranged so4 aste; fornn partv offfthe-frooorztop;off-the'-combustonzchamber,E and extending continuously-or: unbrokenlygifrom; the front Wall F to the rear wall G of the setting. As shown in the drawings, the tube banks 00 of the respective boilers are disposed in parallel relation and the water tubes C of said banks extend parallel to the side walls'D of the setting. The drums are disposed transversely of the boiler in parallel relation to the front wall of the setting, and the tube banks are disposed at the rear A lgreater quantity of fuel can be burned, due to side of the combustion chamber in opposed relation to the front wall F of the setting;Thef

arch H is arranged between the tube banks, in close proximity to the drums A, and consequently,

causes the gases in the upper portion of thecom-l bustion chamber to be deflected laterally into the upper portions of the tube banks located at the opposite sides of said arch. Said arch is pro-V vided with means or is so constructed as to effec-v tively prevent the products of combustion from escaping from the combustion chamber E around the inner ends of the drums A, and also prevent theproducts of combustion from injuriously afiectingl the overhead structure that sustains or supports theinner ends of the dums A.

, In the apparatus herein illustrated the outer ends of the elevated drums A are supported by the side walls D of the setting or by girders or other suitable supports built into said side walls,

and the inner ends of said drums A are sustained by anoverhead supporting structure that comprises horizontallyr-disposed membersl I that extend longitudinally of the apparatus from the front to the rear of same, and hangars 2 which suspend the members l from horizontally-disposed I-beams 3, which, in turn, are supported by uprights 4 arranged adjacent the front and rear walls of the setting. Obviously, the inner ends ofthe drums A may be supported in any other preferred or suitable way.

The arch H is'herein villustrated as being composed of groups of refractory blocks or tile 5 combined with flanged hangars 6 that are car-V riedby a horizontally-disposed I-beam 1 or other suitable means which is suspended from the members I of the overhead drum supporting structure, previously described, said blocks or tile 5 being of such cross-sectional shape that they co-act with each other to produce an arch H atV the top of the combustion chamber, which causes the gases in the central portion of the combustion chamber to be thrown to either side of the arch, intof the water tubes of the respective units. Shallow vertical walls 8 made of re'brijck, are erected on the archfH so as to surround or partially surround the inner end portions of the drums A and prevent the gases from escaping from the combustion chamber E at the dividing line of the two units, or having an injurious eifect on the4 overhead structure that supports the inner ends ofthe ,drums,A. The metallic parts of the arch H areprotected from excessive heat by the arch tile 5. When my invention is applied to two Sterling type boilers, as herein illustrated, the baflies ofthe front tube banks of the respective boilers are joined together in such Va way, as,

A steam generating apparatus ofthe 'construc-Y tion above described, in comparison with a conventional battery boiler of equal heating area and-of equal steam disengaging area,V has vthe followingadvantages:'v i Y (1) It has a single combustion chamber or space common to the tubes and the drums of both boilers, in which fuel can be burned more effectively than in two separate and distinct small combustion chambers;

V(2) It has a combustion chamber in which a the fact that the elimination of the party wall of the conventional battery boiler and throwing the two combustion chambers into a single combustion chamber, adds considerably to the volume of the combustion chamber;

(3) It. has a grate area or burner space which is much larger than the grate area or burner space of the conventional battery boiler, because the space formerly takenA up by a party wall is now available for additional grates or for oil, gas or other burners; and y Y (4) It conserves or more effectively utilizes the heat obtainedfrom the burning fuel, as there is no "party wall or other large mass of refractory material at Vthe dividingv line of the two boilers that absorbs considerable heat, especial-j My improved apparatus has the additional ad;

vantage that a conventional battery of boilers can be converted into this improved Vfurnace by simply removing the common battery wall and replacing it withthe suspended arch arrangement, without moving the boilers or the outer walls of the combustion chamber. A;4 -V Y Having thus.y described my invention, what I claim as new and desirefto secure by LettersPatent is: i

1. A steam generating apparatus composed of a plurality of small boilers arranged side by side, a setting comprising a front wall and side walls, each of said small boilers comprising tubes that extend parallel to the side walls of the setting and drums attached to said tubes and disposed transversely of the boiler in parallel relation to the front wall of the setting, the tube banks of the respective boilers extending parallel to each other and being disposed at the' rear side of the combustion chamber in opposed relation to the front wall of the setting, and a suspended. arch structure arranged between the tube banksl of adjacent boilers so as to form part of the roof of the combustion chamberand extending from the front wall to the rear wall of the seti sides of said arch structure. l

2. A steam generating apparatus prises elevated steam and water drums and the products of combustion from escaping from the combustion chamber around theinner-ends of the elevated steam and Water drums. 'Y

ofthe kind described in claim 1, in which each boiler com-1' so v 

